Olympiad Test: Number Ranking - 1 - Class 8 MCQ

In the series
2 5 3 4 8 7 4 2 6 7 1 5 8 3 7 4 5 3
How many pair of successive numbers have a difference of 3?

How many 5’s are there in the sequence which are immediately preceded by 4 and immediately followed by 7?
2 3 4 5 6 1 4 5 7 1 2 4 5 7 3 8 4 5 9 6 5 3

How many pair of successive numbers are in the given series whose sum is 12?
4 5 7 3 2 8 4 9 1 5 6 4 8 3 1 9 3 5 7

How many pair of successive numbers ar ein the given series whose product is an even number?
6 1 4 6 3 5 1 7 2 6 3 5 7 1 8 3 7 5

How many 9’s are there in the series which are preceded by 7 but not followed by 8?
4 2 9 6 7 9 2 4 7 9 8 4 7 9 3 6 8 9

What is the product of sum of even digits and sum of odd digits in the number
8 6 7 4 3 5 2?

How many 8’s are there in the series which are preceded by 5 but not followed by 7?
4 3 8 6 5 8 2 3 5 8 4 7 5 8 7 4

What is the difference between the sum of even digits and sum of odd digits in the number
7 4 6 2 5 8 9 3?

If the given series is written in the reverse order which number will be 5th to the right of the seventh number from the left?
7, 3, 8, 7, 0, 3, 4, 6, 2, 5, 9, 6, 4, 7

In the given number sequence, how many such even numbers which are exactly divisible by its immediate preceding number but not exactly divisible by its immediate succeeding number?
3 5 6 4 8 7 1 2 4 3 6 4 5 2 6 7

From the given numbers
823, 716, 539, 683, 937
what will be the first digit of the second highest number after the position of only second and third digits with in each number are interchanged ?

From the given numbers
728, 593, 645, 296, 968
what will be the first digit of the second highest number after the position of only first and third digits within each number are
interchanged?